76 lines
2.9 KiB
C#
76 lines
2.9 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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using System;
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using System.IO;
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using System.Linq;
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using System.Text;
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using ASC.Common.Security;
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using ASC.Common.Utils;
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namespace ASC.Security.Cryptography
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{
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public static class MachinePseudoKeys
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{
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private static readonly byte[] confkey = null;
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static MachinePseudoKeys()
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{
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var key = ConfigurationManager.AppSettings["core:machinekey"];
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if (string.IsNullOrEmpty(key))
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{
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key = ConfigurationManager.AppSettings["asc:common.machinekey"];
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}
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if (!string.IsNullOrEmpty(key))
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{
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confkey = Encoding.UTF8.GetBytes(key);
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}
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}
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public static byte[] GetMachineConstant()
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{
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if (confkey != null)
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{
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return confkey;
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}
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var path = typeof(MachinePseudoKeys).Assembly.Location;
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var fi = new FileInfo(path);
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return BitConverter.GetBytes(fi.CreationTime.ToOADate());
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}
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public static byte[] GetMachineConstant(int bytesCount)
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{
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var cnst = Enumerable.Repeat<byte>(0, sizeof(int)).Concat(GetMachineConstant()).ToArray();
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var icnst = BitConverter.ToInt32(cnst, cnst.Length - sizeof(int));
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var rnd = new AscRandom(icnst);
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var buff = new byte[bytesCount];
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rnd.NextBytes(buff);
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return buff;
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}
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}
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} |